jni: enable multicast face in config file

Change-Id: I00d9f53ee239f7834b2b584d20c3a929aca68738
refs: #4761
diff --git a/app/src/main/jni/nfd-wrapper.cpp b/app/src/main/jni/nfd-wrapper.cpp
index 64c16f1..cc56ea0 100644
--- a/app/src/main/jni/nfd-wrapper.cpp
+++ b/app/src/main/jni/nfd-wrapper.cpp
@@ -77,9 +77,6 @@
       {
         tcp
         udp
-        {
-          mcast no
-        }
         websocket
       }
       authorizations